To maximize this impactful ability in Commander, you want to fill your deck with as many 2-colored permanents as possible
That said, this looks like a great inclusion to existing Dog strategies
I think this deck is hard to get working and still seems pretty underpowered, but Ich-Tekik is green so you can play a lot of ramp and Colossuses and see what happens
Ive decided to go a more traditional sacrifice route despite the fact we dont have access to Blood Artist and Zulaport Cutthroat in the 99
Normal Magic decks will naturally create inefficient moments where you spend a three-damage spell on a one-toughness creature, so you need to force energy decks to deal with some occasional inefficiency by design
Midnight Reaper A key card draw engine for Teysa Karlov style aristocrats decks as well as Wilhelt, the Rotcleaver zombie decks, there are only so many cards that do what Midnight Reaper does, so this is a must have for a ton of black decks